| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1263793 | Organic Electronics | 2014 | 5 Pages |
•A new aqueous based polymer was used as hole injection layer.•The improved injection efficiency was characterized by dark injection transient measurement.•The air stability of this new hole injection material is better due to reduced acidity.•A long lifetime device was demonstrated with this new material.
A new aqueous based polymer, Plexcore® OC AQ1200 (AQ1200) was used as a hole injection layer (HIL) in organic light emitting diodes (OLEDs) and the device results are compared with polyethylene dioxythiophene:polystyrene sulfonate (PEDOT:PSS) in terms of injection efficiency and stability. Dark injection transient measurements show a higher injection efficiency in hole-only devices using AQ1200 HIL compared with PEDOT:PSS. Using AQ1200 as an HIL, high efficiency phosphorescent OLEDs are demonstrated to have a long lifetime, with an estimated operational half lifetime (LT 50) of more than 8000 h from an initial luminance of 1000 cd/m2.
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